Algebraic damping of diocotron waves by a flux of particles through the wave resonant layer
- Conference date: 27–30 August 2012
- Location: Greifswald, Germany
Pure electron plasma experiments characterize a novel form of algebraic diocotron mode damping, distinct from the usual exponential damping. This algebraic damping occurs when trap asymmetries cause a weak outward particle flux Γ(r) through the diocotron mode resonant radius rm . The m = 1 and m = 2 diocotron mode amplitudes are each observed to decay as , where t * is the time at which the outward particle flux reaches rm . Moreover, with appropriate amplitude normalization, we find that γ ∼ Γ. A theory model based on conservation of momentum agrees qualitatively with experiments, but some aspects remain puzzling.
- Kelvin Helmholtz instability
- Plasma waves
- Conservation of momentum
- Experiment design
- Pure electron plasma
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Y. K. Semertzidis, M. Aoki, M. Auzinsh, V. Balakin, A. Bazhan, G. W. Bennett, R. M. Carey, P. Cushman, P. T. Debevec, A. Dudnikov, F. J. M. Farley, D. W. Hertzog, M. Iwasaki, K. Jungmann, D. Kawall, B. Khazin, I. B. Khriplovich, B. Kirk, Y. Kuno, D. M. Lazarus, L. B. Leipuner, V. Logashenko, K. R. Lynch, W. J. Marciano, R. McNabb, W. Meng, J. P. Miller, W. M. Morse, C. J. G. Onderwater, Y. F. Orlov, C. S. Ozben, R. Prigl, S. Rescia, B. L. Roberts, N. Shafer‐Ray, A. Silenko, E. J. Stephenson, K. Yoshimura and EDM Collaboration
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